Injector



May 4 1926.

. R. M. OSTERMANN Imam-on NN ww r NN m H [lilium ATTORNEYS May v4 1926.

l R. M. OSTERMANN INJECTDR Original Filed Feb. 18, 1924 3 Sheets-Sheet 3Patented May 1926.

UNITED srAr nUDoLrM. osTnRMANN, or EvANsToN, ILLINOIS, AssIGNo'R To THEsurnminiMinnA ooMrANY, or NEW Yoan, N Y.,

assises PATENT. orifice.

A CORPQBATION 0F DELAW'ARE.

Original application filed February 18, 1924,v Serial No. 693,451.Dvidedvand thisr application l'ed. t NovemberlS, 1924, Serial No.750,546. Renewed October 19, 192`5.

To all whom it may concern.' v Be 1t known that I RUDOLF- M. OSTER-MANN, a citizen of the United States, and a resident of Evanston, CookCounty, State;

to reduce the amount of Water admitted to.

the injector whenever the pressure ofthe exhaust steam falls below avalue sufficient to insure the continuity of .the water jet deliveredthereby; this reduction of thewater is usually accomplished by means ofamanually operated handle which controls a movable cone within theinjector. In addition to the manual regulation of the water theseinjectors are also provided with a supplementary live'steamnozzle' toassist the steam actionof the low pressuresteam nozzle, and' while theadmission of a supplementary supplyl of live steam is effective-to assist the exhaust steam action, it necessarily in volves the.manipulation of additional controlling means, and is subject to thefurther objectionthatv it increases both the maximum and minimum waterdelivery of the injector and therefore does not have any markedinfluence upon the working range of theinjector. v f ,i

It is an object of the present invention to provide an injector of thistype a newv and improved construction byk means of which V the flow ofthe low pressureexhaust steam tif water delivery to Aloe substantiallyiny through the injector is automatically con.

trolled by an element whose movement or lposition would be substantiallyindicative of the pressure of the exhaust steam flowing to the injector.Y v

`A further object is to, provide an, exhaust steam injector 'which willpermit the range l'eil; l: i l y i VYAnother object is to provideadjusting Lnieans, interconnect-ed in sucli a manner vith.

the means for automatically controllin, the flow ofthe exhaust steam,that the amount lowing detailed description and the accom-v panyingdrawings forming a part hereof,

vwherein are illustrated typical examples of installations constructedin accordance Vwith the principles of my invention.

Fig. 1 is a central longitudinal'horizontal sectionjon the line 1-1 ofFig. 2 through an injector embodying my 'invention. v,

Fig. 2 is a side elevationl of a portion of the injector shown inFig. 1. Y

Fig. 8 is a section on the line 8-3 of rig. 1.

Fig. 4 is a diagrammatic illustration of an installation of theinjectorv tov a locomotive. y

Figs, 5 and 6 are a sectionaldetails of parts ofthe installation 'shownin Fig. 4.

Fig. 7 an illustration of a modified form of an installation.

v-Referring to.` Figs. 1 to 3 of the drawings the numeral lOindicatesthe main casing of the injector whichcont-ains therein av main exhauststeam nozzle 11, a Water cone or preliminary mixing nozzle, 12, acombining nozzle 13, a delivery nozzle '14, and a further preliminarymixing nozzle' 15 betweenv the water cone and combining nozzle, all asmore particularly sety fort'hin the aforemem tioned patent to Metcalfe,et al.y

,The main exhaust steam nozzle 11 is movable longitudinally of casing 10to vary the "annular waterY inlet formed between the outer surface ofthe lnozzle 11 and Jglie inner end of the watery cone 12, and to controlthe kamount of waterdrawn through the intake of water delivered. to4the' injector may ybe opening 11a, as in theV structure disclosed f insaid patent, but instead of the manually operated handle employed Ainsuch structure to move said nozzle 11, I provide an internallyscrewsthreaded bushing 16, rotatably mounted withinthe casing 10 andhaving a plurality of gear teeth 17 upon its outer circumference. Themain exhaust steam nozzle is screw-threaded, as atli, to lengage withinthe bushing is. suitable packing as ndicated at 21.9 isinsertedbetween'tle bushing 16 and casing 10, and the bushing isrestricted from movement longitudinally of the casing by any suitablemeans.

A rack 2O for rotating bushing 16 is slidably mounted in a. boss 21 ofcasing 10 and meshes with the gear teeth 17 of bushing 16, said rackbeing shown as a grooved rod which projects through a stuffing box 22 onsaid boss, and is. pivotally connected, as at 23, to one end of a leverl24. ln order to prevent rotation of the main exhaust nozzle 1l, thenozzle is provided with a laterally pro- 'jecting. boss 2 5 which issuitably apertu'red to receive a pm or stud 26 fixed within the end wallof the water cone 12.

Rotatably mounted within a flanged col lar-like extension 27, secured,as by b olts 26, to the flanged end 29 of casing 10 is an internallyscrew-threaded bushing 30, having gear teeth 31 on its outercircumference with which a rack 32 engages. Rack 32 is slidably mountedwithin a boss 33 on the ext-ension 27 and its projecting outer-end ispivotally connected at 32, to the other end of lever 24, theconstruction of bushing BO, rack 82 and boss 86 being similar to? thebushing 16, rack 2O and boss 21, except that the screw-tln'eads of thebushings 30 and 16 are opposite in direction.

A spider '34'terminates at its inner'end in a cone-shaped surface 35, toprovide a valve member which is spaced from the larger end ofthe innerwall of the main exhaust nozzle 11 to form an annular space throughwhich the exhaust steam passes to the said nozzle, while the other endof the spider is formed into an annular, externally screw-threadedcollar 34ZL to engage with the threads of bushing 8O for the purpose ofmoving the live steam passes, and a counter bore spider 64longitudinally of the injector' to vary the size of said annular space.

The spider 34 forms a part of thc live steam nozzle and is provided witha boss 66 having a central bore 67, through which the P which isslidably mounted over the live steam admission pipe A39, pipe 39extending through the manifold 40 and being connected with the livesteam `conduit 41. A key or pin 43 is lined to pipe 39 and engages in asuitable key-wa f or slot 44 within the boss 36 of spider 34 to preventrotation thereof while permitting. longitudinal movement of the spider.

The inner flange of the flanged collar-like extension 27 is providedwith an apertured boss 46 to rwhich the by-pass 47 is connected, saidby-pass leading a portion of the steam to the space between the watercone 12 and the further preliminary mixing nozzle 15 to provide an outerenvelope of steam about the combined jet issuing from the nozzle 15between the Water cone and combining nozzle.

The opening to the boss 46 from the injector is located between thebushings 18 and 36 and a small valve 46 which is suitably seA cured tothe spider 34 is adapted, when theJ spider 34 is moved towards the maineX- aust steam nozzle, to move across and close the opening of the boss46 to an extent substan-v tially proportional to the throttling or" theannular space between the nozzle 11 and water cone 12.

Means are provided for varying the positions of the spider 34 and cone11 to regulate the range of water delivery of the injector, and suchmeans may comprise a manually adjustable rod 57 having its inner endconnected with the pivotal connection 28 of the lever 24, while itsouter end is extended to any conveniently accessible point and isscrew-threaded to receive the hand wheel 58. Figs. 4 to 6 illustrate aninstallation in which the movement of the spider 34 .is effected by anapparatus connected with an element of a locomotive engine, the movementof which element is indicative of variations in the pressure of thesteam exhaust line. The numeral 60 indicates the valve rod of alocomotive to which is secured a eollar 61. L lever 62 pivotally mountedinter-y mediate its ends, has one end thereof pivotally connected to thecollar 61, while its other end is pivotally secured toa piston rod 63 ofa piston 64 slidably mounted within a cylinder 65 formed on the lowerpart of a fluid container 66.

Communication between the fluid container 66 and the cylinder isfurnished through a suction valve 67. A conduit 66 leads from the end ofcylinder 65 to a valve casing 69 in which a pressure valve 76 is locatedat the delivery end of the conduit 68. One end of avpipe line 71 issecured to the valve casing 68, and its other end leads to the lowerpart of a fluid pressure cylinder 2 mounted adjacent to the injector 10,the construction of the injector being identical with that shown inFig. 1. An aperture 73 whichis conA` trolled by a needle valve 74permits a por--A tion of the fluid delivered by the pump 65 to beby-passed into the vfluid container 66. The fluid pressure cylinder 72has slidably mounted therein a plunger 75 which is connected by theplunger rod 76 with the lever 24, which lever is connectedA to the racks2.6 and 32 of the injector, an adjusting rod and handle 58 being`provided all as show-u in Figs. 1 to 3 inclusive. A coiled spring 77 isconfined between the head of cylinder 72 and the plunger 75 and servesto urge'the plunger against the pressure of rthe fluid from the pipeline 71.

The operation of the installation shown in Figs. 1 to 6 inclusive is asfollows: rlhe reciprocation of valve rod 60 causes the piston 64 to bereciprocated, thus withdrawing the fluid from the fluid container 66 andforcing it through conduit 68 into the pipe line 71. Needle valve 74 maybe adjusted to cause a llO f portionof the Huid delivered by the pump tol be ley-passed through the aperture 73 from the valve casing 69yintovtheliuid container 66, it being understood that the size of theaperturel 73 is only suicient to permit a.,

. speed of the engine, and as these tivo factors are fairly indicativeof the exhaust steam pressure, the pressure of the fluid Within the pipeline 7l and cylinder 72 therefore changes in accordance with variationsof the pressure of the exhaust steam.

As the cut-off of the main valve of the engine is regulated by thereverse lever of the locomotive, Fig. 7 shows another form of aninstallation in which the position of the lever 24 is controlled by theposition of the reverse lever 80. For this purpose the center of lever24 isconnected by a link 81, to one arm S2 of a bell crank, the otherarm 83 of Whch lies Within the path of a lug 84 which projectsoutivardly from the side of the reverse lever 80. A spring 86 normallyholds the arm 82 of the bell crank lever in engagement with a stop 87,-as shown in Fig. 7. When the lever 8O is thrown to the normal forwardWorking position, the lug 84 will engage ythe arm 83 of the bell crankand move the lever 24 toY positions corresponding to the position of thereverse lever, thereby making the positions of the racks 2O andconsequently the spider 34 dependent upon the positions of the reverselever. Y

During the automatic.operation of the device by the cylinder and piston,the pivotal connection 23 will act as a fulcrum for the lever 24 thuscausing rack 32 to 'be moved, the rack 2O meanwhile being heldstationary by the rod 57; on the other hand When the hand Wheel 5S isoperated the lever 24 will pivot upon its pivotal connection With therod 7 6; with this arrangement the racks 20 and 32 Will be shifted inopposite directions so that longitudinal movement of the rod 57 in onedirection Will simultaneously cause the annular inlets for the Water andsteam to be restricted, and inthe reverse diy rection Will cause theannular inlets to be increased. It will benoted that the threads of thebushings 18 and-303 are arranged to produce this movement of the nozzlel1 and the threads ofthe vbushing 30 is greater than the threads ofbushing 18, so that When thenoZZle 1l is moved a certain distance by thehand Wheel'58 and rod 57 the'spider 34 will be moved a proportionatelylarger distance but in the same direction, this being necessary becauseof a variation of the quantity of Water requires a greater variation inthe quantity of steam supplied.

It will be understood that the disclosure contained herein is to beconsidered as illustrative and not in a limited sense and that changes,variations, and modifications mayL which is indicative of the exhauststeam conditions, to automatically actuate said valve member inaccordance With variations in said exhaust steam conditions.lr j i 2. Inan injector adapted to be operated by the exhaust-steam from Van engine,a Water controlling device, to regulate the amount of Water delivered tothe injector, a valve member for controlling the flow of exhaust steamthrough said injector, operating mechanism for saidvalve member, andmecha- GQ .l spider 34 respectively, and that the. pitch of nismoperated by the valve travel of the enl gine for actuating saidop-erating means.

3. In an injector adapted to be operated by the exhaust steam from anengine, a Water controlling device, to regulate the amount of Waterdelivered to the injector, a valve member for controlling the flowofexhaust steam through said injector, operating mechanism for saidvalve` member and means comprising a iiuid pressure system operated bythe valve travel of the engine, foractu ating said operatingmechanism.

In testimony whereof I have hereunto set my hand. Y

RUDOLF M. OSIERMANN.`

